Question

What is the value of x so that the equivalent resistance between point A and B is 4.5 ohm ?​

Answer 1

Explanation:

here there is jumper..

so 7 and 6 ohm resistances are in series with each other similarly 2 and x ohm are in series...

R1= 7+6 = 13ohm

R2= 2+x ohm

R1 and R2 are in parallel

1/13+ 1/(2+x) = 1/4.5

it comes out to be 4.89 ohm